@book {MR4719732,
    AUTHOR = {G\"opfert, Alfred and Riahi, Hassan and Tammer, Christiane and
              Z\v alinescu, Constantin},
     TITLE = {Variational methods in partially ordered spaces},
    SERIES = {CMS/CAIMS Books in Mathematics},
    VOLUME = {7},
   EDITION = {Second},
 PUBLISHER = {Springer, Cham},
      YEAR = {[2023] \copyright 2023},
     PAGES = {xxviii+553},
      ISBN = {978-3-031-36533-1; 978-3-031-36534-8},
   MRCLASS = {90-02 (46N10 90C29 90C48)},
  MRNUMBER = {4719732},
       DOI = {10.1007/978-3-031-36534-8},
       URL = {https://doi.org/10.1007/978-3-031-36534-8},
}